ASSIGNMENT  4 Textbook  Assignment: “Internal  Combustion  Engine,”  chapter  12,    pages 12–1 through 12–23 and “Power  Trains,”  chapter  13,  pages  13–1  through  13–18. 4–1. 4–2. 4-3. 4–4. An  internal  combustion  engine  is  a machine  that  converts 1. heat  energy  to  mechanical energy through the burning of a liquid fuel 2. mechanical energy to heat energy through the burning of a liquid fuel 3. mechanical energy to heat energy  through  the  burning  of  a fuel–air  mixture  within  itself 4. heat  energy  to  mechanical energy through the burning of a fuel–air  mixture  within  itself All  internal  combustion  engines rely on which of the following three  things? 1. Oil, water, and air 2. Fuel,  water,    and  ignition 3. Air,  fuel,  and  ignition 4. Air,    ignition, and water In the operation of a gasoline engine,  what  event  forces  each piston  downward? 1. Compression  of  fuel–air  mixture 2. Intake  of  fuel–air  mixture 3. Expansion  of  heated  gases 4. Exhaust  of  waste  gases What are the four basic parts of a 1–cylinder  internal  combustion engine? 1. Crankshaft,  piston,  connecting rod,    and  cylinder 2. Piston,    crankpin,  cylinder,  and crankshaft  bearing 3. Crankshaft  bearing,  cylinder, connecting  rod,  and  exhaust port 4. Cylinder,    intake  port,  exhaust port,  and  piston 4-5. In what order do the strokes of a 4–stroke  Otto–cycle  engine  occur during  operation? 1. Compression,  power,  exhaust, intake 2. Compression,  power,  intake, exhaust 3. Intake,  compression,  power. exhaust 4. Intake,    compression,  exhaust, power 4–6. During which complete stroke of a gasoline  engine  is  the  cylinder pressure  less  than  atmospheric pressure? 1. Compression 2. Power 3. Intake 4. Exhaust 4–7. Which of the following events occurs  during  a  compression  stroke in 1. 2. 3. 4. the  4–stroke  Otto–cycle  engine? A partial vacuum is created Waste gases are exhausted Volume of air–fuel mixture decreases Temperature  of  air-fuel  mixture decreases 4-8. How are the pressure and temperature  affected  in  an  engine cylinder  as  the  air–fuel  mixture  is compressed? 1. Pressure  and  temperature decrease 2. Pressure  and  temperature increase 3. Pressure  decreases;  temperature increases 4. Pressure  increases  temperature decreases 33